code: def setUp(self):
      self.previous_backend = Store.current_backend
      self.comm_manager = mpl_renderer.comm_manager
      mpl_renderer.comm_manager = comms.CommManager
      Store.set_current_backend("matplotlib")
      self._padding = {}
      for plot in concrete_descendents(ElementPlot).values():
          self._padding[plot] = plot.padding
          plot.padding = 0
  
file_path: geoviews/geoviews/tests/plotting/mpl/test_plot.py
imports: import matplotlib.pyplot
  import pyviz_comms
  from geoviews import Store
  from geoviews.element.comparison import ComparisonTestCase
  from geoviews.plotting.mpl import ElementPlot
  from param import concrete_descendents
label_desc: Use image node_id 1 for calling the TestMPLPlot obj's underlying member method code with example usage: obj.setUp() without return types